Late Givetian ammonoids from Hassi Nebech (Tafilalt Basin, Anti-Atlas, southern Morocco)

Bockwinkel, J.; Becker, Ralf; Ebbighausen, V.

doi:10.5194/fr-16-5-2013

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…at Hassi Nebech: Bensaïd ; Bockwinkel et al . ). Cephalopod diversity became rather high towards the end of the Givetian with tens of ammonoid species (Bockwinkel et al .…”

Section: Palaeoecologymentioning

confidence: 97%

“…Bockwinkel et al . ) to goethite where the clay content reaches higher levels (e.g. at Hassi Nebech: Bensaïd ; Bockwinkel et al .…”

Section: Palaeoecologymentioning

confidence: 99%

“…Synpharciceras clavilobum ammonoid Zone) of the northern Tafilalt Platform (Bockwinkel et al . , ); Moderate‐diversity cephalopod accumulations (several species of Archoceras Beloceras , Carinoceras , Crickites , Manticoceras , Tornoceratidae, Orthocerida, Oncocerida) occur in several layers, some associated with remains of arthrodires (upper Palmatolepis rhenana – Pa. linguiformis conodont Zones; Rücklin , ) and Archaeopteris wood fragments in the Kellwasser Limestone of the Tafilalt Platform and the southeastern Maïder Basin (Wendt & Belka ); Moderate‐diversity cephalopod accumulations (several species of Armatites , Cheiloceras , Falcitornoceras , Maeneceras , Paratorleyoceras , Polonoceras , Orthocerida, Oncocerida, Brachiopoda) in the early Famennian ( Cheiloceras subpartitum to Paratorleyoceras globosum ammonoid Zones) of the Tafilalt Platform and the southeastern Maïder Basin (Becker ). Low‐diversity cephalopod accumulations (several species of Platyclymenia , Prionoceras , Orthocerida) in the middle Famennian ( Platyclymenia annulata Zone) of the Tafilalt Platform and the southeastern Maïder region (Korn ; Korn et al . ).…”

Section: Exceptional Preservation and Fossil‐lagerstättenmentioning

confidence: 99%

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Fossil‐Lagerstätten, palaeoecology and preservation of invertebrates and vertebrates from the Devonian in the eastern Anti‐Atlas, Morocco

Frey

Pohle

Rücklin

et al. 2020

LET

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In some Devonian strata in the eastern Anti‐Atlas, fossil invertebrates are abundant, display a high taxonomic diversity and indicate many shifts in palaeoecology. This is reflected in changes in faunal composition of invertebrates and vertebrates. Fossils of jawed vertebrates of late Lochkovian and younger age have been recorded and are relatively common with their abundance and diversity increasing towards the Late Devonian. Environmental changes in the Devonian also left their mark in the preservation of vertebrates and invertebrates from the Anti‐Atlas, which varies strongly through time and regionally. This variation partially reflects environmental changes linked with the evolution of small marine basins during the disintegration of the continental shelf of Gondwana in this region, fluctuations of the regional sea level and other environmental changes. To improve our understanding of these ecological changes, of shifts in preservation through the succession and of the formation of Fossil‐Lagerstätten, we analysed the mineral composition of some invertebrate and vertebrate samples of Devonian and Early Carboniferous age by Raman spectroscopy and X‐ray diffraction. Additionally, we characterized some of these Fossil‐Lagerstätten using palaeontological and sedimentological parameters. We examined eight Devonian Konzentrat‐Lagerstätten and two Konservat‐Lagerstätten with soft‐tissue preservation (the Famennian Thylacocephalan Layer and the Hangenberg Black Shale of the southern Maïder). The last two are the first Konservat‐Lagerstätten described from the Devonian of North Africa. The taphonomic and oceanic settings suggest that these Konservat‐Lagerstätten are formed because of stagnation (related to vertical restriction of water exchange and water depth rather than limited spatial water exchange and a lateral restriction) in the relatively small Maïder Basin with limited water exchange with the neighbouring Tafilalt Basin. The temporally low oxygen levels in the Maïder Basin are a possible reason for the reduced chondrichthyan diversity (missing demersal and shallow water species) compared to the Tafilalt Platform.

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“…at Hassi Nebech: Bensaïd ; Bockwinkel et al . ). Cephalopod diversity became rather high towards the end of the Givetian with tens of ammonoid species (Bockwinkel et al .…”

Section: Palaeoecologymentioning

confidence: 97%

“…Bockwinkel et al . ) to goethite where the clay content reaches higher levels (e.g. at Hassi Nebech: Bensaïd ; Bockwinkel et al .…”

Section: Palaeoecologymentioning

confidence: 99%

Section: Exceptional Preservation and Fossil‐lagerstättenmentioning

confidence: 99%

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Fossil‐Lagerstätten, palaeoecology and preservation of invertebrates and vertebrates from the Devonian in the eastern Anti‐Atlas, Morocco

Frey

Pohle

Rücklin

et al. 2020

LET

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show abstract

“…Hassi Nebech (Figs 19,22; Table 3) The extensive Devonian outcrops at Hassi Nebech, ca 20 km ENE of Taouz (sheet Taouz-Est, NH-30-XV-3), belong to the Tafilalt Basin. The Givetian to Famennian interval has become famous for its ammonoid faunas (Bensaid 1974;Becker et al 2002;Bockwinkel et al 2002Bockwinkel et al , 2013 but there is hardly any literature on the upper Silurian, Lower Devonian and Eifelian strata, which are also well exposed. Klug (2002) mentioned a few Achguigites specimens, as evidence for the lower Anarcestes Limestone.…”

Section: El Khraouia (Figs 1921; Table 2)mentioning

confidence: 99%

Emsian (Lower Devonian) conodont stratigraphy and correlation of the Anti-Atlas (Southern Morocco)

Aboussalam¹,

Becker²,

Bultynck³

2015

Bull. Geosci.

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“…the occurrences in the Cantabrian Mountains (Kullmann 1960), Bithynia in Turkey (Kullmann 1973), the North Urals (Bogoslovsky 1969), the Zeravshan Mountains of Uzbekistan (Bogoslovsky 1980;Becker et al 2010) and South China (Shen 1975;Ruan 1981bRuan , 1996. Becker and House (2000), Klug (2002) and Korn (2002) Givetian ammonoid faunas are mainly known from two geographical regions, the Rhenish Mountains (Holzapfel 1895;Wedekind 1918;Matern 1931a;Bockwinkel et al 2013b), and the Anti-Atlas of Morocco (Bensaïd 1974;Bockwinkel et al 2009Bockwinkel et al , 2013a.…”

Section: Early and Middle Devonianmentioning

confidence: 99%

Paleozoic Ammonoid Biostratigraphy

Korn

Klug

2015

Topics in Geobiology

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Late Givetian ammonoids from Hassi Nebech (Tafilalt Basin, Anti-Atlas, southern Morocco)

Cited by 5 publications

References 5 publications

Fossil‐Lagerstätten, palaeoecology and preservation of invertebrates and vertebrates from the Devonian in the eastern Anti‐Atlas, Morocco

Fossil‐Lagerstätten, palaeoecology and preservation of invertebrates and vertebrates from the Devonian in the eastern Anti‐Atlas, Morocco

Emsian (Lower Devonian) conodont stratigraphy and correlation of the Anti-Atlas (Southern Morocco)

Paleozoic Ammonoid Biostratigraphy

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